Burner



A. R. KUNKEL.

BURNER.

APPLICATION FILED AUG17,1920.

1,385,875'. Patented July 26, 1921.

17u/aww dlg: Z jim 'wu/L- L) Q f ig@ UNITED STATES ALBERT R. KUNKEL, OF SAN ANTONIO, TEXAS.

BURNER.

Specicationof Letters Patent.

Patented J u'iy 26', 1921.

Application led August 17, 1920. Serialy No. 404,196.

To all 107mmy t may concern Be it known that I, ALBERT R. KUNKEL, a citizen of the United States, and residing at San Antonio, Bexar county, State of Texas, have invented certain new and useful Improvements iii-Burners, of which the following is a specification.

This invention relates to oil burners used for heating purposes and consists in 'an improvement on the burner construction disclosed and claimed in my Patent No. 1,184,185, granted May 23, 1916. One of its principal purposes and functions is to secure more perfect combustion of the gaseous mixture escaping from the gas jets and to prevent condensation of the vaporous oil in said mixture. One of its main features resides in flat tapering air tubes leading up through the drip pan on opposite sides of the burner pipe and so curved toward and over said pipe as to discharge substantially directly across and close to the upwardly directed jets of combustible gases issuing from said burner pipe. The air tubes are arranged in pairs with their discharge ends close together parallel and horizontal, facing each other and the gas jet passes up between their discharge ends about midway of their length. l find that this arrangement, particularly with a burner construction such as disclosed in my Patent No. 1,184,185 supplies the right amount of air in the right way to produce perfect combustion, thus securing the beneficial effect of all of the heat units in the fuel and avoiding condensation and the dripping of oil from the burner pipe. It will be noted that the rate of flow of air through the air tubes to support combustion is largely caused by the draft or suc tion produced by the jet of burning gas passing directly across the discharge ends of the tubes and that the supply of air tothe gas jets is thus automatically varied with the demand. The novel features of the invention will be more fully lappreciated from the following description taken with the drawings.

In the drawings:

Figure 1 is a plan view looking down on one form of burner embodying my invention; and

in connection Fig. 2 is a cross section on the line 2 2 of F ig. 1 but showing the fiame deflector on the upper generating pipe in full lines.

Asfully explained in my patent above mentioned, a proper mixture of oil and air is supplied under pressure. to the gas generating or heating pipe l0 from suitable sources through the regulating valve 11. In pipe 10 the mixture is highly heated by the combustion of gases directed toward it from below as hereinafter described, and is converted into proper combustible gaseous form. lt is then conveyed downwardly at 12, after passing through the heating zone, to one end of the burner pipe 13 which is below and parallel to pipe 10 and which has at suitable intervals gas discharge orifices 1411 directed upwardly toward pipe 10. The burner pipe 13 has connected to its other end a gas retainer or pressure pipe 15 which is imperforate parallel to the burner pipe and, Ias will be seen by reference to Fig. 1, the elbow joint 16 forms the connection. The pipe or gas retainer 15 serves to receive any excess gas generated at any time and to hold it under pressure ready to be discharged from the burner openings, thus compensating for any irregularitiesin the action of the generator and insuring a substantially u11iform gas discharge from the burner openings. Flame distributers and heat absorbers 17 of metal are suspended from pipe 10 by any suitable means such as ring-shaped loops 18 and are placed directly above the gas jet openings 14 so that the jets of burning gases will strike them centrally under the bottom and be properly spread and the heat distrib-V uted instead of striking the pipe 10 directly and possibly overheating it locally.

The burner is provided with a drip pan below the burner pipe 13 preferably made of pressed galvanized iron and it has a horizontal top portion 2O and the vertical downwardly extending side portions or flanges 21 at the margins of the top portion. In the upper surface 20 of the drip pan there is a central longitudinal depression 22 directly below the burner pipe 13 but terminating short of the ends of the portion 20. That depression constitutes an oil receptacle or groove and is partially filled with asbestos 23. This larrangement is particularly useful in starting the operation of the burner since the oil may be turnedV on even when the device is cold and allowed to pass out through the burner openings 14 and to fall in the depression 22 saturating the asbestos and may be then ignited and burned to heat the oil in the generator pipe 10 and connections sufficiently to form the combustible vgaseous mixture. It thus acts effectively as a primary heater for the,I burner. The drip Vpan is connected to the burner pipe iron clamp 24 secured to the top portion 20 of the drip pan by screws 25 on opposite sides of the center portion. 26, being bent in the arc of a circle up over pipe 13 and ,one

Y end 27 extending beyond the edge of the drip pan and being bent down over the gas retainer pipe 15.V The parts are thus securely fastened in position.4

As set forth in my prior Patent 1,184,185, the drip pan togetherl with the burner mechanism rwhich it carries, is adapted to be placed on theordinary grate of a stove and the drip pan of course cuts ofi a free and open supply of air up through the grate to the burner. In my prior patent I made use of elongated slots in the top of the drip pan to supply the necessary air for combustion properly and in the right quantity, but I have discovered fthat lthe results may be much improved by the use of mypresent improved means for conveying the air up through the drip pan to the discharge open ings of the burner. According to my present invention the top 20 of the drip pan is provided opposite each burner opening 14 with a pair of longitudinally extending parallel slots 28 and 29 on opposite sides of the groove or depression 22 and open ended air supply tubes 30 and 31 are secured to the top portion 2O over and around the slots and extending upwardly therefrom. The

' tubes are rectangular in cross section and at the point of connection to the top portion 20 their interior is in cross section the same shape and sizeras the slots 28 and 29, but from that point upward they taper transversely to the discharge ends at the top, as shown in Fig. 2. The tubes may be secured to the top portion 2O in any suitable way and for this purpose flanges ittin the portion 20 may be formed on them. lVhilethe lower ends of the tubes are removed laterally a considerable distance from the burner pipe 13, they are bent or curved from that point upwardly toward that pipe so that their upper discharge ends 32 and 33 are close together facing each other above pipe 13 with the gas discharge openin 14 directed upwardly midway between iem and midway of their length. Since they are so Vclose together the jet ofgas issuing from opening 14V passing across and between the outlet ends 32, 33 will act by suction to draw the required amount of air from the tubes to 13 by a galvanized' cause perfect and complete combustion of the gases. The suction being localized is much more effective in securing the right amount of air exactly where needed than was the slot arrangement of my prior patent since in that case the suction was not as great and all of the air drawn in did not necessarily reach the desired point of use. I find that the air supply openings immediately adjacent and on both sides of the gas jet and extending longitudinally on both sides of that jet supplying what may be called sheets of air serve to cause perfect combustion and avoid any condensation of the oil issuing from the discharge opening 14 after the burner is in operation.

It will be understood that any number of gas jet openings 14 may be used as desired or as is necessary in in which my invention is used, but in each instance there should bathe two air supply pipes as illustrated in Fig. 2. In Fig. 1 I have shown a structureV in which there are two gas discharge openings. It will further be' understood that my invention is not limited lin its use to the particular form of burner arrangement shown, but as will ,be evident to those skilled in the art is applicable to various forms.

Having thus described the invention what is claimed as new and desired to be secured by Letters Patent is:

1. In an oil burner the combination with a gas generating portion, of a burner pipe below and connected thereto provided with an upwardly directed discharge opening, a drip pan secured in place and extending horizontally below said burner pipe and having therein a pair of elongated air passages one on each side of the burner pipe opposite the discharge opening and flattened air tubes extending 4upwardly from said passages to a higher level than the burner pipe and curved toward each other at their upper ends so as to discharge sheets ofair from opposite sides directly across the jet issuing from said burner opening. Y Y

2.y In an oil burner the combination with a gasY generating portion, of a burner pipe below and connected thereto provided with an upwardly directed discharge opening, a drip pan secured in place and extending horizontally below said burner pipe and having therein a pair'of parallelslots spaced Vfrom the sides of the burner pipe opposite the discharge openingV and liat tapering the particular device Y pair of slots extending upwardly from the drip pan and curved toward each other over the pipe having the perforation and terminating in slot-like discharges facing each other immediately adjacent the line of movement of the jet of gas from said perforation.

In testimony whereof I affix my s1 nature. 15

ALBERT R. KUN {EL 

